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Product Detailed Parameters
- Description：64.1698 MHz XO 1.8V 2.0X1.6MM OE
- Series：18QHTF21
- Mfr：Mercury Electronics Ind. Co. Ltd
- Package：Strip
- Base Resonator：Crystal
- Type：XO (Standard)
- Frequency：64.1698 MHz
- Function：Enable/Disable
- Output：LVCMOS
- Voltage - Supply：1.8V
- Frequency Stability：±50ppm
- Absolute Pull Range (APR)：-
- Operating Temperature：-40°C ~ 85°C
- Spread Spectrum Bandwidth：-
- Current - Supply (Max)：26mA
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：4-SMD, No Lead
- Size / Dimension：0.079" L x 0.063" W (2.00mm x 1.60mm)
- Height - Seated (Max)：0.031" (0.80mm)
- Supplier Device Package：-
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Overview
The 18QHTF21-64.1698-OE is a standard crystal oscillator (XO) manufactured by Mercury Electronic Ind. Co., Ltd. It operates at a frequency of 64.1698 MHz and utilizes LVCMOS output logic. The device is designed for a supply voltage of 1.8V and features an Enable/Disable control function via the OE pin. It is housed in a compact 4-SMD, No Lead package with dimensions of 2.0mm x 1.6mm.
Feature Summary
- Supports LVCMOS output logic for digital interface compatibility
- Includes active low enable/disable functionality for power management
- Utilizes a lead-free surface-mount package for automated assembly
Applications
- Clock signal generation for high-speed data transmission interfaces
- Timing reference for embedded processors and microcontrollers
- Synchronization sources in telecommunications equipment
Procurement Notes
Verify the specific suffix 'OE' against the manufacturer's current datasheet to confirm the enable pin configuration and voltage levels. Ensure the operating temperature range meets system requirements. Cross-reference the package outline drawing to validate footprint compatibility during PCB layout. Confirm RoHS compliance status if required by regulatory standards.
Selection Notes
Select this component when a precise 64.1698 MHz clock source is required for LVCMOS-compatible circuits. Consider the 1.8V supply constraint and the need for software-controllable power states via the OE pin. Evaluate the small 2.0x1.6mm form factor against available board space. Compare jitter specifications against the target application's timing sensitivity requirements.
Part Context
This part belongs to the 18QHTF21 series of standard oscillators from Mercury Electronics. The series offers various frequencies within a consistent 4-SMD no-lead package. The model number indicates the specific frequency and voltage characteristics, distinguishing it from other variants in the family that may differ in frequency or supply voltage.
Replacement Considerations
Direct substitutes include the 18QHTF21-64.1698-PD variant from the same manufacturer, which shares identical electrical and mechanical specifications. Verify pinout compatibility and thermal performance before substitution. Other manufacturers offering equivalent LVCMOS oscillators in 2.0x1.6mm packages may require schematic review.
